74 lines
1.2 KiB
JavaScript
74 lines
1.2 KiB
JavaScript
var assert = require('assert')
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var UINT64 = require('..').UINT64
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describe('shiftLeft method', function () {
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describe('0<<1', function () {
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it('should return 0', function (done) {
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var u = UINT64(0).shiftLeft(1)
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assert.equal( u.toNumber(), 0 )
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done()
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})
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})
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describe('1<<2', function () {
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it('should return 4', function (done) {
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var u = UINT64(1).shiftLeft(2)
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assert.equal( u.toNumber(), 4 )
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done()
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})
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})
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describe('1<<16', function () {
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it('should return 2^16', function (done) {
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var n = Math.pow(2, 16)
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var u = UINT64(1).shiftLeft(16)
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assert.equal( u.toNumber(), n )
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done()
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})
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})
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describe('1<<32', function () {
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it('should return 0', function (done) {
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var u = UINT64(1).shiftLeft(32)
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assert.equal( u.toNumber(), 0 )
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done()
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})
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})
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describe('1<<31', function () {
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it('should return 2^31', function (done) {
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var u = UINT64(1).shiftLeft(31)
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assert.equal( u.toString(16), '80000000' )
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done()
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})
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})
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describe('9<<28', function () {
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it('should return 2^31', function (done) {
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var u = UINT64(9).shiftLeft(28)
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assert.equal( u.toString(16), '90000000' )
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done()
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})
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})
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})
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